使用uibesizerpath + Cashaplayer画椭圆

使用uibesizerpath
Cashaplayer
画椭圆:

+ (void)drawOvalAnimSourceView:(UIView *)sourceView {

    //view是曲线的背景view

    UIView *view = [[UIView alloc]initWithFrame:sourceView.bounds];

    view.backgroundColor = [UIColor clearColor];
    view.transform = CGAffineTransformMakeRotation(-M_PI_2*0.5);
    [sourceView addSubview:view];

    //第一、UIBezierPath绘制线段

    UIBezierPath *firstPath = [UIBezierPath bezierPathWithOvalInRect:sourceView.bounds];

    //第二、UIBezierPath和CAShapeLayer关联

    CAShapeLayer *lineLayer2 = [CAShapeLayer layer];

    lineLayer2.frame = sourceView.bounds;

    lineLayer2.fillColor = [UIColor clearColor].CGColor;

    lineLayer2.path = firstPath.CGPath;

    lineLayer2.strokeColor = [UIColor redColor].CGColor;
    lineLayer2.lineWidth = ;

    //第三，动画

    CABasicAnimation *ani = [CABasicAnimation animationWithKeyPath:NSStringFromSelector(@selector(strokeEnd))];

    ani.fromValue = @;

    ani.toValue = @;

    ani.duration = 2.5; // 2快 3慢

    [lineLayer2 addAnimation:ani forKey:NSStringFromSelector(@selector(strokeEnd))];

    [view.layer addSublayer:lineLayer2];

    UIImageView *hand = [[UIImageView alloc] initWithFrame:CGRectMake(, , , )];

    hand.image = [UIImage imageNamed:@"img_help_doubletap_00034"];

    [view.layer addSublayer:hand.layer];

    UIBezierPath *aniPath = [UIBezierPath bezierPathWithOvalInRect:sourceView.bounds];

    CAKeyframeAnimation *animation = [CAKeyframeAnimation animation];
    animation.keyPath = @"position";
    animation.duration = ;
    animation.repeatCount = ;//CGFLOAT_MAX;
    animation.path = aniPath.CGPath;
    animation.removedOnCompletion = NO;
    [hand.layer addAnimation:animation forKey:@"slide"];

}